Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1b36dfffb95e422d35cb40a1325986fd3dc6f1f0891517dab0607500f2443bf' 
  AND token = 'fiyLk3FzNimuYpC5QuGnGDcSZ+Qel9ZBCnG6JpF3ql0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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