SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0913b983a712110c5d6a033e0d69235ef7c0d71bb71c939dddafc1c9bf472086' 
  AND token = '/Rq4FRTFlVdHYHTFJYtb+5gRgUVCfsXqhPRHZIiaz14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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