Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0c7792b12d42640c80cfa3f0d2eaa69a33ba4277880af57203b53c3b33be915' 
  AND token = 'yYMMod62DAsz5oTSWQ+2z/1qIPNPt8ukMTm+76rgEiw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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