Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff13437437bf57122f348f6459fbed91424c4b90de63602b0639d85bcdc8c14a' 
  AND token = 'FMRbtut8pyTWRql7p/TDAtehz7/9P5tMJwA4xqP1M1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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