Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce1fa04c195902c42d31857d25badeb1e34465cb1dbbead02e3b97ec1edb53a8' 
  AND token = 'RRVhTv+QJ7QqondQ6aJg4DQGgxALP6JA0NB1P+Pfboo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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