Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2459b4df89efea9e69c17472841f1123f26b9952c04e535f9b0205314e41274a' 
  AND token = 'S59zfIt8Khqoiirs0LAMHZqDexjaJIwxC0dcluZT0Dg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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