Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ebfbb65276eb2db25b8749a655025d4f587d39172a9faf49d2981236b33be82' 
  AND token = 'lDGIUa+pdE3/5L3V4bw6WyuG/kAjGkCyMPJwllBdt+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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