Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b07a4a90b55a805a906a493c808da7acc2e16e29781a6fb14827f24c96dd13d' 
  AND token = 'fdl9oWX0pdSyxcCCAdMeFDGj5YSVzKHSNG506L09f+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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