Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3be05dae0afd2fda086e492be66ea8c2575ea997890410b86409a9ddb56eeb33' 
  AND token = 'sIN8zBF+3gYiy/cPwkReEVttvFz5NyIARGz7ChKfhhI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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