Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '404a8faf0b1507f8b7bc75f8aebedc9c004687fa500a18183a07c57667b45d7e' 
  AND token = '6ubmTZgTBvd4zMOKcwOcEgJUZHZ2TJJh4NHuOXTRT2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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