Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8208b8547b8fbde8d2affa5c8ab528cdfca2c196944b6ccf9e53e5c0a8512196' 
  AND token = 'JaFPinYCyWtAMN0XIE/D0cGNk0ZxQDAWEYj3pxRnxCU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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