Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dd1f5f2ff8dab4754f4b68fb4e2545b6cdb128e8d0ef922d486306d67a97fcf4' 
  AND token = 'oRfX+A8sbJTPItsse0YHNkouRl5TBYbebxqgydUsEV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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