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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2765ad20b8b1daf2c9b377dbb6df6ae48e6cacc884585fba3fe783ea7c32c0ef' 
  AND token = 'VvihZpLh4Bx6i8am4pTHb0e/jN6htW9453gkElLPS/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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