Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6710037ea40d2d4400ffdeacf15ed2c4064680b5c6849d8b1fe9df82e9efcbb4' 
  AND token = '5s3N9Dsz2pfqZ7G9MXhqOiU6T7SDBYdzZTKZ1jx/isk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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