Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2dfb6a6e353af5bddf8197b62cecd41f82acf137db2264b47385a61a84083747' 
  AND token = 'ltX3jJb/04HYa/27FniR4iBt5SO6zq5ffE7ibajX1mA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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