Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66716133b47f1ffcb368ef40258f119e3783768e882358b23ce03f0f15ee9f3d' 
  AND token = 'RLPHLlRPX4w5kEA/SaauN5GeSwuXw7TwaGF+Rs+lgvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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