Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb0ef4c04ec89a4ab0657ab189ffa785cd2cfbe36f1a3d46d1236905c79b5b1b' 
  AND token = 'LbYypO54tB8C17C2k2X64xzOnZK88FxJoJmEKd6QqyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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