Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f033eeab9a122e35a732e4d0f34608f4a40996e7c593309512ba5a52af691c75' 
  AND token = 'eDhPdW//ue53+NhDCDSU/2ak/Uqr5xsZCQIPOjeWZmI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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