Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8896f4a8f51de0cf523078df845c1ff93ea0fe00cb49da6c28a59fe74c026647' 
  AND token = 'f0CWBi8/Re9ugyDTTdnFCJiBAOdPveZvaY0cPlEsJWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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