Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a930b693c1c1a1d52c085ccc6963c272f6a2cbf969fd2b6921e72de1be6c1ed' 
  AND token = 'b67p0wCTkeoHa69w2Lvg1whEORbjU16lc6IHG+FNtUM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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