Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1119c4591a269e6cfa7f9e7042019e78270312b6d50c9315c1d2bd08632dc98' 
  AND token = 'acCEjkw6la38l+NPhRpYApC7KTrz7iHErmiBUuP5cpk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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