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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23837e87bb0312260449dbb58d9b5900596b723a0f17c38a2af5565e005b5df0' 
  AND token = 'XBkJZmFciCN11/5opabaytDQ1pV/UIO5zNbLHel0ECk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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