Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91366a83e495acf449196a59d8a4db9921c32070095081f204ecd397a0702800' 
  AND token = '2uWdEGZFYgDYVAaVoGxj8V1LXjiu2PVToS7gqgke+CQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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