Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9d166624bd515e63b8413960a8ba646e9790dd18c5a6707e87921ea334df005' 
  AND token = 'FPIj2h6F7sHFMR62ewOXcATITI8WUJRiTs97kHN14WM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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