Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69eedce5299a8cf8f2cc15bb9a0d273da990ab453280ef1ac7ac6d6689666da1' 
  AND token = 'e6DClR9gAoLJS8Gki3d1h5NfIaeKYakhbzu8FsOnllk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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