Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85a2680e6c553c2d472027167df07a9d8113e7baacae682aaa0e9c09d3e4c7be' 
  AND token = 'RqKAgGF2mAo8Ajjehs3a+IA0iGm6stR7BQNRZfYce18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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