Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f5afa79f0d2958be4de00338614bc6a13d2a74b3a712451c1870df924efa6ae' 
  AND token = 'QIPD5p5tABarKCxdxo1Q6dCt0T0FxK75Krr0gH5WR8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}