Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28de6106d340136a6ce0ffed4c32c89d5bf6924d69a5c99a504cc0e140d79137' 
  AND token = '8+ZsaRsFt2sSPYY5OuZt6T2waOZ9Jxb2c6kizeRw8DY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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