Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'be6e620ef6121466b1ffe24dcba641cfb88ef1cf56d06028ecc5b97903685313' 
  AND token = 'YLC6lV+VxDMX+CAPuqOV0vSanV/iR+v77MBxy8TtjOA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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