Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a6e604cffd9a7e4d25384d3edf66090188c3ae2924809860df9fd336be34ac54' 
  AND token = 'Q3khN3MRw/qf3LCTZwD1quXUUNw28ZaF+kFtFW4uxD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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