Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fabb262eb2246fd98aa0a9b9eaf6c23638e0dd86a662d6b7553724bb18b89aa3' 
  AND token = '88nx8Dh29z3Ihz/FZazAb7agOlQ7gePNspD19Oq4GuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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