Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adedf541d7822a4c50b3a723b704123186ea67d6fcbe93c129accd6b91c1be3a' 
  AND token = 'x/7sa0nttlb17rprN4SmxqZs0wBvWXLWkbAY7aqQ0u8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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