Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e196d851689cd58902ab464e1d23d32e2f917cc12dcd62febb7ce9241a4e54d5' 
  AND token = 'hUOaMjpyfy8FHxxzjxa47+H9ER8uuOUFg40r3iBOS+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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