Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '697d4a19cb292f5d4dcaf5083af1b33e94ba403d415ba5ccd81f662f5c0dd9a9' 
  AND token = '83g57TKl85O6+EHet6OkLRiaRv7lIPW5XyU4mOOeHAQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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