Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2d77d33acfbc37b8cb0731745a5636ee10ffd106ce22eeea8ddfdb18aa68633' 
  AND token = 'uXb1v94nhZmu/kUeOrXKxta0rxu1vOmuU0YkwxdZdCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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