Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7eb7d5eae99a728edc028be847311d643726367b367464ccc9b660e819614211' 
  AND token = '5CW36xSrdsv+GozoF+KOoZz1IsK5DefO/J8EESscgiM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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