Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '372e5ec60e4a7c1715adbf24fc0d6b1ce8030c7c8bf4fc6fb96bea413a3b1470' 
  AND token = 'a0ZDbvZWmzoi4jHlZ8Jz54b/cLFiTDnwy7Sq+aNZXaw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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