Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2008aa99a1b33ad2c0f975f9b5c1f5dad1a65c19de95e3a8696449a9d77bb6db' 
  AND token = 'KHQyUip1t28ZNQYdeNNSbhQQmYCZ8gCx0cCrpKZUw0Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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