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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '207c7041e507b40182635ec076a37fb85ae0611801c6f63d735a95d33a8d819d' 
  AND token = 'h6AXsa6lghpE2bSFtk8kpcunJ3Bhfry6FITSCBFUfqs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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