Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd14dab589d02bc2802b0807481a33377c0d1f10507d7f2785831ad680eaefc63' 
  AND token = 'u6q4wMpDlScjdYwYrF0MCa8O+ulapXSHXuvifq+kl4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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