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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b07f4a60a4d846d06711762d541af35d8c643a9720aa180e85424f090e30067' 
  AND token = 'LnqCw2HYG3DSeD6MT5N0Vgyc41PRTI0IYuLUWSZ9Zag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}