Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34eb676d7cf21f5bd98b59dcaa503c5140ed6717ba65bfe29d8e51c6465a7783' 
  AND token = 'GcNkFh61Am+cvkWS2YCBHQeH2pa57/hhDLJmiMvYquA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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