Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a89d925b8559a3f931eb65f254b8ff941e2c1be7025f3e593c33cd9bb5167645' 
  AND token = 'tGp3BbpvotU8pWJuJH/+Vnze6dFR8o+l5PjJaJQa54E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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