Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3b85940a81d26fbe165505c8bb8bcc6e069f8564bc99be13baa1d59bc38c455d' 
  AND token = 'hsx/Ik3BWmZCeh83vDQYQkDcTSR3uxzZ9H1qxm2JxP4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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