Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '507ed6bb4d40fdbbc886634c71e225911ec5bf1685a8c57b9e9d297679683230' 
  AND token = 'wZBa4IX5DpaKMLQjIKW7FP8Ib4sFZHsac4HX5DqmEm4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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