SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '93475788e9275cb5573e3866fe3c65818540e79f0dcc088920707e09b7dc1007' 
  AND token = 'WDwa5YodxUNVEQ3uajMKw4+zxZ2ZbDNcJqF/ojpzg6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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