Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afde4b7348448d482740f2bdd391214145427b89207bae04f6e56f2f4c95e97a' 
  AND token = 'PcLSjP6I+3ZK1VEQDX3wIBsDI5s/XwuAsXjBIacwe2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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