Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0edb576b202a64b70be5ed99b6da3e15d9f83cd89754ae3248396cdfb55956ac' 
  AND token = '2kt5IYue5IHCQcfUwwZbAaQotddGFoPKlkAmzCo1LAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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