Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8b7a892ab3be41f7df555a16e4b9f32a587e1c074b9508a2ee2c59a57984b865' 
  AND token = '/d/eo9+m7LxF46bia4ticxhRiShQNO0HTMUqTdVhLy4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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