Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa2ae809da59fbaeb4535340e6efb26d9df7a1ce32f56b1ab2feff7e2b9ba892' 
  AND token = 'jZLfu1mHhnxdGN7487DYQ+NjMeJUM3j9hYNHUJW5994=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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