Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c4a29ab40688430771773fca3c3a5bfa1531854c289e27b91492a1292f4c4831' 
  AND token = 't2FV3qWNkfe+dn/Lpdy/lP/nXjUtexn8ICaQ3D+s1gk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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