Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f612215f65f29c91f3f5343c990b30977474ff75027d3f0944da1c666fbdbd8' 
  AND token = 'WzXo2gmNWpOrACD+xSY35ULXGwSOZvHy2AE31As31Ik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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