Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e336245b0bc94143b1d820865da406e8b9cfc6ea62737920d76fdca22a173e37' 
  AND token = '37ScWBodf7ljSU7YVofVWw650Oto6QON9qI/zvL1d6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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