Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a2dd06b66ed69049c152ebd49b28231f73eddf28de7bbddf94028b4d6382aa7' 
  AND token = 'tnoOs3saPOmEjX9oa5t7oh2xm6ePivXoEUVETEVkLpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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