Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e932b0dc3cb040f17aece325a314c7d6e7903fe07229966c2bdce458f2e21fac' 
  AND token = '3QD1W0CxgV9h9HgxlHkQfU/2/rRuz03Aldm/8DG8TA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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