Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '767a37c93a41893a539e8813f5ff5e1685b935c6a9ebf6cbb1d0eb25971ef503' 
  AND token = 'zEhCDdMlxZwbkeBtZQ8fMckxF4v1a74aNObJW2Y2b1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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