Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'acb0b064c394005f6adb6bba84c8ab0e8055fe794e5f3d888f31f1316638b85f' 
  AND token = 'fb6V0ov/hjQJbHhDvNjq9g5g4bIooc3Gcq9EY8M3aSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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