Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ea4f7d6f143c65ffd507c31e505210eaf72878ca8365142cf7ff1fb27006fe23' 
  AND token = 'trUxJPBZ+cWfZmUfHReTgl6Cz5vRJGJg5uJ7Fntbowo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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