Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1dd47b38de1338bddabc3b116b54aa2b03ed7511e271fcff1420b71c2f48d7c' 
  AND token = 'Vhxluv3yPko/ECGB+DHmse0aAbVDzONRTEEZfRXliSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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