Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e07bb757b6b6058573dd7c6bfc703674db1919703ca27c84dc8e431245b4da51' 
  AND token = 'uxPXX1TGwL+E+ooB8QfIj57+f1+clm6QZbYn07yQnxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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